th
9 Class
CBSE Board
MATHEMATICS
CHAPTER – 1
Number Systems
, VIDYAPEETH
NUMBER SYSTEMS
DPP-1
[Introduction, Natural Numbers, Whole Numbers,
Integers, Rational Numbers,]
1. Which one is false? 6. Which of the following is not rational?
(A) Every natural number is a whole 4
number (A) (B) 0. 712
3
(B) Every integer is a whole number 1
(C) Every integer is a rational number (C) 81 (D) 44
(D) Every natural number is a rational
number 7. The product of all prime numbers be-
tween 10 and 20 is:
2. Decimal representation of a rational num- (A) 143 (B) 2431
ber cannot be: (C) 46189 (D) 138567
(A) Terminating
(B) Non-terminating non-repeating 8. The H.C.F. of two odd consecutive posi-
(C) Non-terminating repeating tive integers is:
(D) None of these (A) 1 (B) 3
(C) 5 (D) 7
3. The exponent of 2 in the prime factoriza- 9. The value of
tion of 144, is: 1 1 1 1
(A) 4 (B) 5 1 − 1 − 1 − … 1 − is
(C) 6 (D) 3 3 4 5 99
p
equal to where p and q are co-primes
4. 1192 – 1112 is: q
(A) Prime number and q ≠ 0, then (p + q) is equal to:
(B) Composite number (A) 47 (B) 93
(C) 1 (C) 101 (D) 172
(D) 0
51 1
5. If X = 28 + (1 × 2 × 3 × 4 × … × 16 × 28) 10. If = 1+ , where x, y, z are
29 1
x+
and Y = 17 + (1 × 2 × 3 ×……× 17), then 1
y+
X – Y is a z
(A) Prime number 2
z−y
(B) Composite numbers odd positive integers, then is
(C) 1 y−x
(D) 0 equal to
(A) 1 (B) 4
(C) 9 (D) 49
(1)
9 Class
CBSE Board
MATHEMATICS
CHAPTER – 1
Number Systems
, VIDYAPEETH
NUMBER SYSTEMS
DPP-1
[Introduction, Natural Numbers, Whole Numbers,
Integers, Rational Numbers,]
1. Which one is false? 6. Which of the following is not rational?
(A) Every natural number is a whole 4
number (A) (B) 0. 712
3
(B) Every integer is a whole number 1
(C) Every integer is a rational number (C) 81 (D) 44
(D) Every natural number is a rational
number 7. The product of all prime numbers be-
tween 10 and 20 is:
2. Decimal representation of a rational num- (A) 143 (B) 2431
ber cannot be: (C) 46189 (D) 138567
(A) Terminating
(B) Non-terminating non-repeating 8. The H.C.F. of two odd consecutive posi-
(C) Non-terminating repeating tive integers is:
(D) None of these (A) 1 (B) 3
(C) 5 (D) 7
3. The exponent of 2 in the prime factoriza- 9. The value of
tion of 144, is: 1 1 1 1
(A) 4 (B) 5 1 − 1 − 1 − … 1 − is
(C) 6 (D) 3 3 4 5 99
p
equal to where p and q are co-primes
4. 1192 – 1112 is: q
(A) Prime number and q ≠ 0, then (p + q) is equal to:
(B) Composite number (A) 47 (B) 93
(C) 1 (C) 101 (D) 172
(D) 0
51 1
5. If X = 28 + (1 × 2 × 3 × 4 × … × 16 × 28) 10. If = 1+ , where x, y, z are
29 1
x+
and Y = 17 + (1 × 2 × 3 ×……× 17), then 1
y+
X – Y is a z
(A) Prime number 2
z−y
(B) Composite numbers odd positive integers, then is
(C) 1 y−x
(D) 0 equal to
(A) 1 (B) 4
(C) 9 (D) 49
(1)
